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authorGeert Uytterhoeven <geert@linux-m68k.org>2013-12-10 11:35:47 +0100
committerGeert Uytterhoeven <geert@linux-m68k.org>2013-12-30 21:01:09 +0100
commit4e25c0e92f8eaf69bc51d1d523bcb7268e7dd162 (patch)
tree55125e7e00544bfca2beafebcf31795be8279caf /arch/m68k
parent9da4a8d9197e42d532f2e2af072d8219105139b2 (diff)
downloadop-kernel-dev-4e25c0e92f8eaf69bc51d1d523bcb7268e7dd162.zip
op-kernel-dev-4e25c0e92f8eaf69bc51d1d523bcb7268e7dd162.tar.gz
m68k/mm: Check for mm != NULL in do_page_fault() debug code
When DEBUG is enabled, do_page_fault() may dereference a NULL pointer, causing recursive bus errors. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/mm/fault.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/arch/m68k/mm/fault.c b/arch/m68k/mm/fault.c
index eb1d61f..c7725f1 100644
--- a/arch/m68k/mm/fault.c
+++ b/arch/m68k/mm/fault.c
@@ -77,8 +77,7 @@ int do_page_fault(struct pt_regs *regs, unsigned long address,
#ifdef DEBUG
printk ("do page fault:\nregs->sr=%#x, regs->pc=%#lx, address=%#lx, %ld, %p\n",
- regs->sr, regs->pc, address, error_code,
- current->mm->pgd);
+ regs->sr, regs->pc, address, error_code, mm ? mm->pgd : NULL);
#endif
/*
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